CN103921068A - Single-curvature cover machining method - Google Patents
Single-curvature cover machining method Download PDFInfo
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- CN103921068A CN103921068A CN201410136878.8A CN201410136878A CN103921068A CN 103921068 A CN103921068 A CN 103921068A CN 201410136878 A CN201410136878 A CN 201410136878A CN 103921068 A CN103921068 A CN 103921068A
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- covering
- milling
- skin part
- roll bending
- sagging
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P2700/00—Indexing scheme relating to the articles being treated, e.g. manufactured, repaired, assembled, connected or other operations covered in the subgroups
- B23P2700/01—Aircraft parts
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Bending Of Plates, Rods, And Pipes (AREA)
- Milling Processes (AREA)
Abstract
The invention discloses a single-curvature cover machining method. The single-curvature cover machining method comprises the following steps of feeding, rolling bending, flattening and milling. Secondary rolling bending is required to be performed on a single-curvature three-radian cover with high machining difficulty and a single-curvature thick cover with high machining difficulty after the single-curvature three-radian cover and the single-curvature thick cover are milled. The single curvature cover machining method can be used for machining a simple single-curvature cover or a complex single-curvature cover, chemical milling can be changed into mechanical milling, the single-curvature cover machining efficiency and the single-curvature machining precision are guaranteed, and the machining cost is effectively saved.
Description
Technical field
The present invention relates to covering manufacture field, be specifically related to a kind of single degree covering processing method.
Background technology
The manufacture of existing covering forming technology, particularly large-scale thin skin, traditional diamond-making technique is after roll bending, to carry out milling, and chemistry milling method environmental pollution is serious, and processing cost is high and efficiency is lower, cannot meet existing batch of requirement of going into operation fast.And existing method of covering being carried out to machine milling after first roll bending, due in roll bending process, that selects rolls bed, during roll bending, feeding number of times and the amount of feeding are improper, cause skin part roll bending not in place, roll bending does not become required radian, causing to process causes covering to be scrapped, the skin part of roll bending is being carried out in milling process, because skin part easily produces the reasons such as indivedual regions bulge phenomenon causes part to be crossed cutting with stress, cause covering to be scrapped, and skin part is in roll bending, machine milling, in the processes such as turnover because method step is not right, skin part is produced to a large amount of scuffings causes part to be scrapped, and single degree covering occupies 70% of covering total amount in large-scale aircarrier aircraft, in order to save processing cost, guarantee covering machining accuracy and efficiency, the single degree covering processing method to address the above problem of being convenient to implement of researching and developing a kind of system is those skilled in the art's technical problem urgently to be resolved hurrily and difficult point.
Summary of the invention
Not enough for prior art, the present invention discloses a kind of single degree covering processing method, and the method comprises blanking, and roll bending flattens, milling, and single degree three radian coverings and the single degree thick covering large for difficulty of processing also need to carry out secondary roll bending after milling is complete.No matter be for the simple single degree covering of processing, or the single degree covering of processed complex, all can adopt processing method of the present invention, and making milling change machine milling completely into becomes possibility, go back bonding curvature covering working (machining) efficiency and machining accuracy simultaneously, effectively save processing cost.
For achieving the above object, the technical characterictic that the present invention adopts is:
Single degree covering processing method, is characterized in that: comprise the following steps:
A blanking, by plate on shear plate machine by the size blanking that has more covering edge 200-240mm, form skin part; Find out and need the radian of roll bending position, with marking pen, rule;
B roll bending, select numerical control triaxial to roll bed, after wiping roller bearing, skin part, carry out roll bending, make three roller bearings that roll bed drive rotation, upper roller bearing is done rectilinear motion feeding, 4-6 feeding simultaneously, the amount of feeding is 0.2-2mm, the height dimension that upper roller bearing is controlled in numerical control is higher than covering thickness 5-10mm, selects manually to control roller bearing rotation direction, detects the radian of skin part roll bending;
C flattens, manufacture the vacuum suction card platform that is applicable to skin part size, clean skin part, vacuum is inhaled card platform, for clamping the fixture of skin part, after the skin part of slinging makes its edge lean against vacuum to inhale on the locating piece of card platform, whereabouts skin part, with briquetting, push down covering perk one side, the bolt of manual fastening this side, do not tighten, the aluminium sheet that hangs to be slightly less than skin part size is pressed on skin part, with briquetting, push down all the other 3 sides again, the bolt of manual fastening all the other 3 sides, do not tighten, remove aluminium sheet, opening vavuum pump vacuumizes, skin part is close to vacuum to be inhaled on card platform, select again fastened tools by the bolt tightening of covering four sides, beat table look-up, guarantee that covering flattens completely, tolerance is within the scope of-0.04～0.04mm,
D milling, selects 3 coordinate high-speed milling machines, dedicated integral alloy slotting cutter, adopt successively successively block-by-block milling, passed examination after the sagging trough end of milling, tool changing milling skin part profile, hole and opening, not milling is saturating, and all millings finish rear cleaning skin-surface and platform, release bolt, close vavuum pump, remove pressure, remove briquetting, the covering of slinging cleaning surface, the saturating profile of not milling, opening are cut off in pincers worker, polishing burr.
Described single degree covering processing method, is characterized in that: described briquetting is the cuboid keeping flat, and the upper surface of described cuboid has the logical screw that connects whole cuboid.
Described single degree covering processing method, is characterized in that: the degree of depth of adopt successively successively block-by-block milling to be specially in described steps d, 1) all sagging grooves being sunk sorts from small to large, draws all sagging depth value A1～An; Divide all sagging grooves of 2-3 secondary clearing milling to A1; 2) the sagging groove that is A1 by the degree of depth of sinking is got rid of, the sagging groove that the sagging degree of depth of milling is A2; 3) with reference to 2) operation repeatedly, get rid of all sagging grooves that meet specification requirement, all the other do not reach the sagging groove of requirement milling, the sagging groove that the degree of depth is An until milling is sunk, finishes the groove milling of sinking.
Described single degree covering processing method, is characterized in that: shape clamp in the radian that detects skin part roll bending in described step b is specially and adopts, the model of described interior shape clamp is corresponding with the radian of described skin part roll bending.
Described single degree covering processing method, is characterized in that: the thickness of described covering is 1.5-5.6mm.
Described single degree covering processing method, is characterized in that: described covering is thick covering, the thickness of described thick covering is 3.0-5.6mm.
Described single degree covering processing method, is characterized in that: described covering has three radians.
Described single degree covering processing method, it is characterized in that: also comprise bis-roll bendings of step e, secondary roll bending feeding number of times is 5-10 time, each amount of feeding is 0.2-0.5mm, top and bottom at skin part during secondary roll bending add backing plate, and the thickness of described backing plate is 0.76-2.29mm.
Single degree covering processing method of the present invention with respect to the beneficial effect of prior art is:
Single degree covering processing method of the present invention, is applicable to the processing of various single degree coverings, successfully milling is changed into machine milling, not only reduces the pollution to environment, has also improved covering working (machining) efficiency and machining accuracy, cuts down finished cost.
The specific embodiment
In Large Civil Aircraft, single degree covering has occupied covering total amount more than 70%, so single degree covering is processed the particularly important effect having at aviation field.The present invention discloses a kind of single degree covering processing method, comprises the following steps:
A blanking, by plate on shear plate machine by the size blanking that has more covering edge 200-240mm, form skin part; Find out and need the radian of roll bending position, with marking pen, rule.The roll bending radian that needs for simple covering is regulation radian, and for complicated covering, for example the roll bending radian that needs of single degree three radian coverings, the thick covering of single degree is less than regulation radian.
B roll bending, select numerical control triaxial to roll bed, after wiping roller bearing, skin part, carry out roll bending, make three roller bearings that roll bed drive rotation, upper roller bearing is done rectilinear motion feeding, 4-6 feeding simultaneously, the amount of feeding is 0.2-2mm, the height dimension that upper roller bearing is controlled in numerical control is higher than covering thickness 5-10mm, selects manually to control roller bearing rotation direction, detects the radian of skin part roll bending.Before roll bending, must first clean roller bearing and skin part, avoid scratching skin part when roll bending.Feeding number of times, the amount of feeding and the roller bearing of this step is with respect to the height of covering, and the stress of each radian of skin part in the time of can meeting roll bending, guarantees that skin part can not produce resilience when follow-up flattening machine milling, affects the precision of covering radian.
C flattens, manufacture the vacuum suction card platform that is applicable to skin part size, clean skin part, vacuum is inhaled card platform, for clamping the fixture of skin part, after the skin part of slinging makes its edge lean against vacuum to inhale on the locating piece of card platform, whereabouts skin part, with briquetting, push down covering perk one side, the bolt of manual fastening this side, do not tighten, the aluminium sheet that hangs to be slightly less than skin part size is pressed on skin part, with briquetting, push down all the other 3 sides again, the bolt of manual fastening all the other 3 sides, do not tighten, remove aluminium sheet, opening vavuum pump vacuumizes, skin part is close to vacuum to be inhaled on card platform, with fastened tools, the bolt of covering four sides is twisted dead again, beat table look-up, guarantee that covering flattens completely, tolerance is within the scope of-0.04～0.04mm.Before flattening, fixture and the briquetting that need to clean equally skin part, vacuum suction card platform and be exclusively used in clamping covering, by locating piece, determine the position of skin part, avoid putting the capturing position that moves around after skin part, by briquetting, aluminium sheet, fixtures etc. are fully deployed in vacuum by skin part and inhale on card platform, employing fastened tools is fastening, manually the fastening stressed Pneumatic fastening tool that evenly preferably adopts.
D milling, selects 3 coordinate high-speed milling machines, and dedicated integral alloy slotting cutter adopts successively successively block-by-block milling, and preferably successively successively block-by-block milling is specially, 1) all sagging grooves the are sunk degree of depth sorts from small to large, draws all sagging depth value A1～An; Divide all sagging grooves of 2-3 secondary clearing milling to A1; 2) the sagging groove that is A1 by the degree of depth of sinking is got rid of, the sagging groove that the sagging degree of depth of milling is A2; 3) with reference to 2) operation repeatedly, get rid of all sagging grooves that meet specification requirement, all the other do not reach the sagging groove of requirement milling, the sagging groove that the degree of depth is An until milling is sunk, finishes the groove milling of sinking.Passed examination after the sagging trough end of milling, tool changing milling skin part profile, hole and opening, it is saturating that not milling thoroughly leaves the not milling of skin material surplus of 0.2-1mm thickness on the skin part thickness direction of milling position, and all millings finish rear cleaning skin-surface and platform, release bolt, close vavuum pump, remove pressure, remove briquetting, the covering of slinging cleaning surface, the saturating profile of not milling, opening are cut off in pincers worker, polishing burr.This step, because the covering launching is all with different big or small stress, once in milling process, very easily producing indivedual regions bulge phenomenon causes skin part to be crossed cutting, therefore need to adopt successively the successively mode of block-by-block Z-direction feeding to carry out milling, make every by the covering of milling, to be sunk and all evenly discharge its stress, avoided the situation of cutting or milling is not in place to occur.
Preferably, at c, flatten in step, using the briquetting of auxiliary clamping skin part is special-purpose skin part briquetting, and it is the cuboid keeping flat, and the upper surface of cuboid has the logical screw that connects whole cuboid.
Preferably, shape clamp in the radian that detects skin part roll bending in step b roll bending process is specially and adopts, the model of interior shape clamp is corresponding with the radian of described skin part roll bending.It is convenient a lot of that interior shape clamp is pressed the inspection of mould tire than traditional process, and the phenomenon that the skin part of having avoided moving around causes covering to scratch has improved the efficiency of roll bending simultaneously.
Preferably, the inventive method is also applicable to the processing of the thick covering of single degree, and the thickness of covering is 3.0-5.6mm.
Preferably, the also applicable processing with the single degree covering of three radians of the inventive method.
Situation about being more or less the same for the gradient of three radians, milling after a roll bending, differs larger situation for three radian gradients, also needs secondary roll bending.Radian is stipulated in processing for the thick covering of single degree because a roll bending arrives, in flattening step, because stress cannot flatten too greatly preferably, consequently affect the effect of milling, so the thick covering of single degree also needs to carry out secondary roll bending.After roll bending to a three radian gradient differs not too greatly during for a roll bending of single degree three radian coverings, carry out milling, carry out secondary roll bending after milling is complete again, roll bending is to the radian requiring; For the thick covering of single degree, during a roll bending, roll bending, to being less than after regulation radian, is carried out milling, carries out secondary roll bending after milling is complete again, and roll bending is to stipulating radian.
Because the difficulty of secondary roll bending is very large, need to overcome that machine milling sink that position easily produces impression and the phenomenon that causes skin part to be scrapped, therefore, secondary roll bending feeding number of times is increased to 5-10 time, each amount of feeding is reduced into 0.2-0.5mm, top and bottom at skin part during roll bending add backing plate, and the thickness of backing plate is 0.76-2.29mm.The single degree three radian covering 85327151-107 of take are example, this covering is single degree covering, profile is divided 3 radians, is respectively R53, R20, R62 inch, and covering thickness is 3.81mm, difficulty of processing is very large, need to adopt the method for secondary roll bending, after roll bending becomes radian to be R53, R40, R62 inch for the first time, carry out milling, after milling completes, then to carry out roll bending to radian be for the second time R53, R20, R62 inch.
Although illustrated and described embodiments of the present invention, those having ordinary skill in the art will appreciate that: in the situation that not departing from principle of the present invention and aim, can carry out multiple variation, modification, replacement and modification to these embodiments, scope of the present invention is limited by claim and equivalent thereof.
Claims (8)
1. single degree covering processing method, is characterized in that: comprise the following steps:
A blanking, by plate on shear plate machine by the size blanking that has more covering edge 200-240mm, form skin part; Find out and need the radian of roll bending position, with marking pen, rule;
B roll bending, select numerical control triaxial to roll bed, after wiping roller bearing, skin part, carry out roll bending, make three roller bearings that roll bed drive rotation, upper roller bearing is done rectilinear motion feeding, 4-6 feeding simultaneously, the amount of feeding is 0.2-2mm, the height dimension that upper roller bearing is controlled in numerical control is higher than covering thickness 5-10mm, selects manually to control roller bearing rotation direction, detects the radian of skin part roll bending;
C flattens, manufacture the vacuum suction card platform that is applicable to skin part size, clean skin part, vacuum is inhaled card platform, for clamping the fixture of skin part, after the skin part of slinging makes its edge lean against vacuum to inhale on the locating piece of card platform, whereabouts skin part, with briquetting, push down covering perk one side, the bolt of manual fastening this side, do not tighten, the aluminium sheet that hangs to be slightly less than skin part size is pressed on skin part, with briquetting, push down all the other 3 sides again, the bolt of manual fastening all the other 3 sides, do not tighten, remove aluminium sheet, opening vavuum pump vacuumizes, skin part is close to vacuum to be inhaled on card platform, select again fastened tools by the bolt tightening of covering four sides, beat table look-up, guarantee that covering flattens completely, tolerance is within the scope of-0.04～0.04mm,
D milling, selects 3 coordinate high-speed milling machines, dedicated integral alloy slotting cutter, adopt successively successively block-by-block milling, passed examination after the sagging trough end of milling, tool changing milling skin part profile, hole and opening, not milling is saturating, and all millings finish rear cleaning skin-surface and platform, release bolt, close vavuum pump, remove pressure, remove briquetting, the covering of slinging cleaning surface, the saturating profile of not milling, opening are cut off in pincers worker, polishing burr.
2. single degree covering processing method according to claim 1, is characterized in that: described briquetting is the cuboid keeping flat, and the upper surface of described cuboid has the logical screw that connects whole cuboid.
3. single degree covering processing method according to claim 1, is characterized in that: the degree of depth of adopt successively successively block-by-block milling to be specially in described steps d, 1) all sagging grooves being sunk sorts from small to large, draws all sagging depth value A1～An; Divide all sagging grooves of 2-3 secondary clearing milling to A1; 2) the sagging groove that is A1 by the degree of depth of sinking is got rid of, the sagging groove that the sagging degree of depth of milling is A2; 3) with reference to 2) operation repeatedly, get rid of all sagging grooves that meet specification requirement, all the other do not reach the sagging groove of requirement milling, the sagging groove that the degree of depth is An until milling is sunk, finishes the groove milling of sinking.
4. single degree covering processing method according to claim 1, is characterized in that: shape clamp in the radian that detects skin part roll bending in described step b is specially and adopts, the model of described interior shape clamp is corresponding with the radian of described skin part roll bending.
5. single degree covering processing method according to claim 1, is characterized in that: the thickness of described covering is 1.5-5.6mm.
6. single degree covering processing method according to claim 1, is characterized in that: described covering is thick covering, and the thickness of described thick covering is 3.0-5.6mm.
7. single degree covering processing method according to claim 1, is characterized in that: described covering has three radians.
8. according to the single degree covering processing method described in claim 6 or 7, it is characterized in that: also comprise bis-roll bendings of step e, secondary roll bending feeding number of times is 5-10 time, each amount of feeding is 0.2-0.5mm, top and bottom at skin part during secondary roll bending add backing plate, and the thickness of described backing plate is 0.76-2.29mm.
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| CN201410136878.8A CN103921068B (en) | 2014-04-04 | 2014-04-04 | Single degree covering processing method |
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| CN201410136878.8A CN103921068B (en) | 2014-04-04 | 2014-04-04 | Single degree covering processing method |
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| CN103921068B CN103921068B (en) | 2016-01-27 |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105033585A (en) * | 2015-08-03 | 2015-11-11 | 江西洪都航空工业集团有限责任公司 | Double-curved-surface sawtooth skin manufacturing method capable of controlling gap clearance precisely |
| CN105081009A (en) * | 2015-09-14 | 2015-11-25 | 江西洪都航空工业集团有限责任公司 | Correction cushion block for large roll-bent skin part |
| CN105397423A (en) * | 2015-12-09 | 2016-03-16 | 北京航星机器制造有限公司 | Manufacturing method for large-scale thin-wall skin with inner ribs and complex mold cavities |
| CN105665488A (en) * | 2016-02-25 | 2016-06-15 | 成都飞机工业（集团）有限责任公司 | Controlling method for residual stress on outer surface of roll bending skin |
| CN108817864A (en) * | 2018-07-20 | 2018-11-16 | 北京星航机电装备有限公司 | A kind of forming of titanium alloy arc-shaped workpiece and positional dissection method |
| CN109570924A (en) * | 2018-12-03 | 2019-04-05 | 江西洪都航空工业集团有限责任公司 | A kind of technique patch cutting method of covering class part |
| CN110238432A (en) * | 2019-05-17 | 2019-09-17 | 陕西飞机工业（集团）有限公司 | A kind of single multilayer processing method of chemical milling template |
| CN111673377A (en) * | 2020-05-22 | 2020-09-18 | 浙江西子势必锐航空工业有限公司 | Manufacturing process of single-curve aircraft skin |
| CN114789326A (en) * | 2022-06-01 | 2022-07-26 | 沈阳飞机工业（集团）有限公司 | Machining method of large-scale front edge skin part |
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| CN105033585A (en) * | 2015-08-03 | 2015-11-11 | 江西洪都航空工业集团有限责任公司 | Double-curved-surface sawtooth skin manufacturing method capable of controlling gap clearance precisely |
| CN105081009A (en) * | 2015-09-14 | 2015-11-25 | 江西洪都航空工业集团有限责任公司 | Correction cushion block for large roll-bent skin part |
| CN105397423A (en) * | 2015-12-09 | 2016-03-16 | 北京航星机器制造有限公司 | Manufacturing method for large-scale thin-wall skin with inner ribs and complex mold cavities |
| CN105665488A (en) * | 2016-02-25 | 2016-06-15 | 成都飞机工业（集团）有限责任公司 | Controlling method for residual stress on outer surface of roll bending skin |
| CN108817864A (en) * | 2018-07-20 | 2018-11-16 | 北京星航机电装备有限公司 | A kind of forming of titanium alloy arc-shaped workpiece and positional dissection method |
| CN109570924A (en) * | 2018-12-03 | 2019-04-05 | 江西洪都航空工业集团有限责任公司 | A kind of technique patch cutting method of covering class part |
| CN110238432A (en) * | 2019-05-17 | 2019-09-17 | 陕西飞机工业（集团）有限公司 | A kind of single multilayer processing method of chemical milling template |
| CN111673377A (en) * | 2020-05-22 | 2020-09-18 | 浙江西子势必锐航空工业有限公司 | Manufacturing process of single-curve aircraft skin |
| CN114789326A (en) * | 2022-06-01 | 2022-07-26 | 沈阳飞机工业（集团）有限公司 | Machining method of large-scale front edge skin part |
| CN114789326B (en) * | 2022-06-01 | 2023-06-27 | 沈阳飞机工业（集团）有限公司 | Processing method of large-sized front edge skin part |
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